Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 156gr | Reichenbeg HDB Ogival bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-17.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,114 psi | 85% | 2949 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,028 psi | 88% | 3025 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3061 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 54,665 psi | 86% | 3009 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,072 psi | 88% | 3120 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,566 psi | 90% | 3097 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,332 psi | 87% | 3048 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,522 psi | 90% | 3169 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3156 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,795 psi | 86% | 3173 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,043 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,217 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,942 psi | 89% | 3182 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,549 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,666 psi | 89% | 3153 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3150 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,121 psi | 69% | 2992 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,752 psi | 86% | 3225 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,226 psi | 77% | 3061 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 56,840 psi | 89% | 3087 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3150 fps | 97.6% |
| Bofors RP7 | <<locked>> | 90% | 56,376 psi | 88% | 3068 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 57,421 psi | 90% | 3104 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,795 psi | 86% | 3117 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 54,505 psi | 85% | 3077 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,319 psi | 90% | 3100 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,071 psi | 86% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,245 psi | 87% | 3153 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 57% | 1939 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,782 psi | 87% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,679 psi | 86% | 3028 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,435 psi | 90% | 3068 fps | 99.1% |
| IMR 4350 | <<locked>> | 94% | 57,537 psi | 90% | 3104 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,534 psi | 85% | 3041 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 56,507 psi | 89% | 3110 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,725 psi | 90% | 3123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,840 psi | 89% | 3091 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 56,304 psi | 88% | 3015 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,882 psi | 86% | 3022 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,476 psi | 85% | 3035 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 56,028 psi | 88% | 3084 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,556 psi | 70% | 2894 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 55,956 psi | 88% | 3031 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,884 psi | 89% | 3028 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,521 psi | 87% | 3077 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,708 psi | 86% | 3097 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 57,624 psi | 90% | 3245 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 54,897 psi | 86% | 3107 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 56,579 psi | 89% | 3104 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,852 psi | 83% | 3140 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 94% | 57,421 psi | 90% | 3163 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,094 psi | 74% | 3002 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,840 psi | 58% | 1982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,406 psi | 90% | 3091 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,595 psi | 90% | 3169 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,027 psi | 85% | 3143 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,159 psi | 88% | 3146 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,766 psi | 86% | 3173 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,279 psi | 68% | 3005 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 84% | 56,811 psi | 89% | 3035 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,913 psi | 89% | 3081 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,245 psi | 87% | 3074 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 98% | 55,869 psi | 88% | 3136 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 56,376 psi | 88% | 3068 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,476 psi | 85% | 3035 fps | 99.5% |
| Shooters World Precision | <<locked>> | 84% | 54,882 psi | 86% | 3022 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,028 psi | 88% | 3084 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,274 psi | 87% | 3091 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,115 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,029 psi | 89% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,462 psi | 85% | 2913 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,273 psi | 85% | 2989 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,390 psi | 87% | 3130 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 56,478 psi | 89% | 2956 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,797 psi | 89% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,348 psi | 90% | 3068 fps | 96.2% |
| Somchem S365 | <<locked>> | 94% | 54,172 psi | 85% | 3107 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,492 psi | 89% | 3110 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 82% | 57,595 psi | 90% | 2946 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,174 psi | 90% | 2992 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,624 psi | 90% | 3009 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,737 psi | 86% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,072 psi | 89% | 3100 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,112 psi | 82% | 3022 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 84% | 55,724 psi | 87% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,028 psi | 88% | 3100 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,739 psi | 89% | 3163 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,942 psi | 89% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,795 psi | 86% | 3117 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,934 psi | 72% | 3136 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,217 psi | 88% | 3071 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,956 psi | 89% | 3107 fps | 97.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 50,604 psi | 79% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,994 psi | 77% | 2904 fps | 97.2% |
| Accurate 3100 | <<locked>> | 90% | 37,840 psi | 59% | 2746 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 47,993 psi | 75% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,637 psi | 57% | 2743 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 80% | 54,027 psi | 85% | 3038 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,745 psi | 72% | 2877 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 46,978 psi | 74% | 2976 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 98% | 51,459 psi | 81% | 3091 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,821 psi | 80% | 3104 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,224 psi | 72% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,501 psi | 78% | 2976 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,969 psi | 56% | 2759 fps | 97.4% |
| Alliant Reloder-17 | 68.7 gr | 80% | 40,930 psi | 64% | 2897 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,499 psi | 73% | 2966 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,918 psi | 69% | 2953 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,789 psi | 44% | 2536 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,201 psi | 57% | 2795 fps | 95.9% |
| Alliant Reloder-26 | 75.7 gr | 86% | 34,751 psi | 54% | 2799 fps | 96.2% |
| Bofors RP15 | <<locked>> | 98% | 46,035 psi | 72% | 2999 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 46,456 psi | 73% | 2913 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,918 psi | 69% | 2953 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 40,944 psi | 64% | 2772 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 46,920 psi | 74% | 2923 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 38,870 psi | 61% | 2795 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 44,686 psi | 70% | 2887 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,315 psi | 52% | 2641 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,445 psi | 81% | 3028 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,799 psi | 64% | 2871 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 42% | 1736 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,141 psi | 82% | 2992 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,109 psi | 75% | 2913 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,517 psi | 79% | 2946 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 41,829 psi | 66% | 2808 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,453 psi | 67% | 2805 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 35,244 psi | 55% | 2694 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 50,807 psi | 80% | 3009 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,142 psi | 83% | 3028 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 52,910 psi | 83% | 2963 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,312 psi | 76% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,682 psi | 62% | 2746 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 38,043 psi | 60% | 2723 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 36,390 psi | 57% | 2713 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,489 psi | 82% | 2979 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,374 psi | 84% | 2976 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,834 psi | 77% | 2963 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,761 psi | 75% | 2969 fps | 95.8% |
| Norma MRP | <<locked>> | 90% | 40,059 psi | 63% | 2897 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,695 psi | 57% | 2743 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 49,211 psi | 77% | 2982 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 49,052 psi | 77% | 3064 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 82% | 38,130 psi | 60% | 2785 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 98% | 43,526 psi | 68% | 2927 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 43% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,021 psi | 74% | 2907 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,664 psi | 84% | 3104 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,569 psi | 68% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,521 psi | 57% | 2759 fps | 96.9% |
| ReloadSwiss RS 70 | 69.7 gr | 80% | 35,549 psi | 56% | 2762 fps | 96% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,147 psi | 63% | 2927 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 49,980 psi | 78% | 2927 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,714 psi | 69% | 2854 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 51,793 psi | 81% | 3012 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 45,469 psi | 71% | 2946 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 40,944 psi | 64% | 2772 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,682 psi | 62% | 2746 fps | 96.8% |
| Shooters World Precision | <<locked>> | 80% | 48,312 psi | 76% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,043 psi | 60% | 2723 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,034 psi | 71% | 2910 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,518 psi | 82% | 3005 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,447 psi | 84% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,136 psi | 71% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,914 psi | 61% | 2690 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,063 psi | 71% | 2940 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 53,098 psi | 83% | 2907 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,947 psi | 69% | 2851 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 53,447 psi | 84% | 3005 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 32,982 psi | 52% | 2690 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 43,004 psi | 67% | 2861 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 54,056 psi | 85% | 2897 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,328 psi | 79% | 2894 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,749 psi | 80% | 2907 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,148 psi | 66% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,101 psi | 60% | 2746 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 94% | 42,511 psi | 67% | 2838 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 48,950 psi | 77% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,507 psi | 59% | 2743 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 30,734 psi | 48% | 2621 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,275 psi | 58% | 2710 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 38,870 psi | 61% | 2795 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,123 psi | 44% | 2631 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,576 psi | 82% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,905 psi | 72% | 2913 fps | 95.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 93 powders for .300 Weath. Mag. loaded with the .308 | 156gr | Reichenbeg HDB Ogival. Norma MRP delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,245 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 156gr | Reichenbeg HDB Ogival they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.